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authorPJ Waskiewicz <peter.p.waskiewicz.jr@intel.com>2009-11-12 23:50:43 +0000
committerDavid S. Miller <davem@davemloft.net>2009-11-13 20:46:55 -0800
commit342bde1b70c79bfc8509b017b3987f3c7541ff8e (patch)
treec3a9e2f2b15d864a360667c6f00a0dd2fe8e0c01 /drivers/net/ixgbe
parent8a0717f30ce93a686d325122d8b0c6b73b32cfb3 (diff)
ixgbe: Make queue pairs on single MSI-X interrupts
This patch pairs similar-numbered Rx and Tx queues onto a single MSI-X vector. For example, Tx queue 0 and Rx queue 0's interrupt with be ethX-RxTx-0. This allows for more efficient cleanup, since fewer interrupts will be firing during device operation. It also helps with a cleaner CPU affinity for IRQ affinity. Signed-off-by: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ixgbe')
-rw-r--r--drivers/net/ixgbe/ixgbe_main.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/net/ixgbe/ixgbe_main.c b/drivers/net/ixgbe/ixgbe_main.c
index 04892863ef0..884152d1085 100644
--- a/drivers/net/ixgbe/ixgbe_main.c
+++ b/drivers/net/ixgbe/ixgbe_main.c
@@ -3626,10 +3626,10 @@ static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
* It's easy to be greedy for MSI-X vectors, but it really
* doesn't do us much good if we have a lot more vectors
* than CPU's. So let's be conservative and only ask for
- * (roughly) twice the number of vectors as there are CPU's.
+ * (roughly) the same number of vectors as there are CPU's.
*/
v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
- (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
+ (int)num_online_cpus()) + NON_Q_VECTORS;
/*
* At the same time, hardware can only support a maximum of